At least with the black tank, you should vent to the roof. Some vent through the floor-thing is when you flush, the stinky air in the tank is displaced out the vent. If the wind is just right, will fumigate the outside folks. Roof vent is the best. Good Luck, TomC

Current bus has roof vent and three fantastic fans that do a fantastic job of sucking in odor. Only way we can use them to ventilate is blowing out with windows open to allow air in. Can't leave one open without running the fan.

Roof vent is about equal distance from the three fans and sure to drift odor to one. If I was doing it now I would run the vent as near the rear of roof as possible or even out the back side of the rear cap. I am considering putting a elbow on the vent and running it to the rear to get away from the fans.

It is really annoying that I can't even crack open the ceiling vents when the bus is not in use to ventilate.

What Sean said up a few posts ^ we also vented our black tank through the floor of the luggage bay. Never ever have had odors in the coach while driving or parked and never smell them when outside and parked. Works perfectly. Highly recommended. As Sean mentioned, you'll get tons of fruit/poo flies making eggs in your black tank unless you screen the vent.

Sent from my iPhone using Tapatalk. Clumsy fingers may contribute to mistakes.

Does anyone know how the high end converters get away with tank venting without any holes in the roof?

Dave the answer might help both of us.

Grant

Hi Grant,

I have worked on many entertainer coaches, Hemphill, Florida Coach, & Star City, and they all vent theirtanks from a fitting at the top of the tank that turns down and vents directly through the floor of the bay.It will also act as an overflow. Lol... And by the way, the entertainer coaches stink too when the tanks are not flushed..

I vented my tanks through the floor near the rear axle ( I hate holes in the roof). I had some issues earlier on but it ended up being a toilet vent that was sucking poo smells into the coach while driving. New head and we are poo free. The other benefit is when the tank is full it just runs out the vent. Disgusting but better than filling your shower tray

In the trouble shooting era I installed a little buddy or a tank buddy or an anti poo smell fan. I cant remember the name but it runs inline with the vent and pulls just enough to prevent possitive pressure in the tank.

I also opted for the single grey, black tank system. I can bypass the grey water when I am staying at relatives. Otherwise it all ends up in the same place anyway and the system is cheaper and less hassles.

WelcomeI don't have any experience using this type of vent but looks like it would work well. When it comes to how you vent your tanks there is a lot of differing opinions here. I for one made mine go out the roof. I didn't see any problem with putting HOLES through the roof. I think each person has there own right to how they do it but I for one believe the vent should go up just like in any house built in this country. I haven't personally seen any sewage vents in building construction coming out low. All I have seen is out the roof or near the roof.

My Way John

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If It Can't Be Grown Then It Has To Be MinedJohn RiddleWells NV1984 MC9

I tied the large tanks and the shower into one large bent that exits the roof and it also works great..I have each sink independently vented at the source with a shorty type local vent, this set up worked for me very well.

I was able to run mine up to the refer vent, one less hole in the roof.

If you ever to go rallys where they use a honey wagon to suck out your tanks, you will be grateful for a large (at least 1-1/2") vent. Without it, they will empty the traps and perhaps even collapse the tank.